%0 Journal Article %A Kaufman, B. Z. %D 2001 %I Begell House %N 2 %P 6 %R 10.1615/HydrobJ.v37.i2.50 %T Preferential Behavior of Pontoporeia affinis Lindstrom (Crustacea, Amphipoda) %U https://www.dl.begellhouse.com/journals/38cb2223012b73f2,13c270a8530eb7a0,1568381e0eaf69d3.html %V 37 %X Photo-, thermo-, halo-, and pH-preferendums of Pontoporeia affinis as a representative of freshwater organisms were studied. The individuals demonstrated a distinct daily rhythm of photopreferendum, as well as stable values of thermo-, halo-, and pH-preferendums during the day. The causes and evolutionary significance of these responses are discussed. %8 2001-04-01